/Engine/Source/Runtime/Engine/Classes/Engine/GameViewportClient.h
Add a cursor to the set based on the enum and a slate widget
void AddSoftwareCursorFromSlateWidget ( [EMouseCursor::Type](API\Runtime\ApplicationCore\GenericPlatform\EMouseCursor__Type) InCursorType, [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [SWidget](API\Runtime\SlateCore\Widgets\SWidget) > CursorWidgetPtr )